A lone shooter was dead Friday after an attack at a high school north of Seattle, police said.

Marysville Police Commander Robb Lamoureux said the shooter was a student, but he did not have any additional information including where the shooting took place and if anyone else was killed or wounded.

Many students and staff members were seen walking out of Marysville Pilchuck High School, about 30 miles north of Seattle, after police and ambulance crews surrounded the campus. Lamoureux said police were going room by room, searching the school to make sure it was safe.

"It is an active scene," he said. "We do ask parents to please stay away."

There were conflicting reports about the number of possible injuries. Susan Gregg, a spokeswoman at Harborview Medical Center in Seattle, said the facility was expecting one patient but had no other information.

Arthur White, who lives across from the school, tells The Daily Herald a large number of police vehicles converged on the scene quickly late Friday morning.

"I've never seen so many police in my life. It's a tragedy," White said.

Ayn Dietrich, an FBI spokesperson in Seattle, said the agency had personnel on their way to the scene to help authorities with the investigation.

The latest school shooting in the region happened at Seattle Pacific University, where a gunman killed one student and wounded two others on June 5.